Roll rim head



Nov. 2, 1937. M. J. KlsT ET AL 2,097,982 Ro Wav-ORA. /577 ATTORNEYS Patented Nov. 2, 1937 o UNITED STATES ROLL RIM HEAD Michael J. Kist and vioooi A. Kist, Johnstown, Pa.'

Application 'october 14, 193e, seal No. 105,580

i 1 Claim.

This invention relates to improvements in rolls, such as used in various types of mills for crushing, grinding, or pulverizing materials. It isv broadly old to provide such rolls with replaceable rims, but many of the expedients heretofore resorted to for the purpose are complex and costly and in some cases require special equipment, such as jigs and the like, for changing the rim. The present invention is directed to specific features of improvement, which will be readily apparent from the following disclosure when read in connection with the accompanying drawing.

In the drawing- Fig. 1 is an end View of a crushing roll embodying our invention; Fig. 2 is a cross section thereof on the angle line 2-2 of Fig. 1; Fig. 3 is an enlarged detail of one of the wedges used for initially positioning and finally securing the parts in assembled relation; Fig. 4 is an enlarged detail section on line 4-4 of Fig. 1; Fig. 5 is a Afragmentary view similar to Fig. 1 illustrating a modification.

Referring in detail to the drawing, I represents the outer renewable rim or wearing inember, which is made of relatively hard, wear resisting metal and which is adapted to be discarded or replaced from time to time. The replaceable rim is mounted on and secured in a novel manner to a relatively soft metal core 2.

In accordance with the present invention, the rim and core have cooperating slots and lugs with wedging means interposed between them and in some cases a filling of readily fusible metal is interposed between the outer surface of the core andthe inner annular surface of the rim. AsA illustrated in the embodiment of the invention shown in Fig. 1, the rim is provided with a, plurality of inwardly extending lugs 3, which project into radially disposed slots 4 formed in the core member. Preferably, the normal diameter l of the core member is considerably less than the cally with respect to the core.

l inside diameter of the rim and a filling of readily fusible metal, indicated at 5, is interposed between the members. In assembling the members,

however, the rim must be positioned concentri- To facilitate such accurate centering, we preferably utilize oppositely tapered wedges 6, lone of which is shown in detail in Fig. 3 and the relative position being shown in Fig. 4.

-As illustrated, there are three sets of lugs and cooperating grooves. And there are two pairs of cooperating wedges which coact with each lug.

'I'hese wedges are driven to position from opposite sides of the assemblage and provide means for adjusting the relative relationship of the parts with precision. And after the parts are so adjusted we weld the respective wedges to the lll adjacent members, for example, each wedge will be secured to the adjacentmember, a body of weld metal, such as indicated at 8-8 in Fig. 4. After the parts are thus positioned and the wedges are welded in place, the filling 5 of readily fusible l fmetal, such as babbitt, spelter, or the like, is poured into the annular space between the core and the rim. Preferably, the surfaces of the core and the rim are each slightly concaved, or made non-cylindrical, as shown in Fig. 2, so as to 2 prevent any tendency for the filling material to move endwise.

As illustrated in Fig. 5, instead of having the lugs extending inwardly from the rim, the somewhat opposite arrangement may be utilized, 2g

wherein the core-lugs 3a project outwardly into slots 4a formed in the rim I. In this modification, wedges 6 will serve exactly the same function as explained in connection with the other figures.

Various modifications may be made by those .skilled in the art without departure from the invention as defined in the appended claim.

n What we claim is`:

soft metal, a replaceable rim of relatively harder metal, a, body of readily fusible metal interposed between the core and rim, lugs having inwardly converging faces formed on the rim, said core having slots therein with outwardly diverging 4 initially to accurately position the core relatively 4 to the rim. j

MICHAEL J. KIST. VICTOR A. KIST.

A crushing roll comprising a, core of relatively 3 

